"""Platform for the Daikin AC."""
import asyncio
from datetime import timedelta
import logging

from aiohttp import ClientConnectionError
from async_timeout import timeout
from pydaikin.daikin_base import Appliance
import voluptuous as vol

from homeassistant.config_entries import SOURCE_IMPORT, ConfigEntry
from homeassistant.const import CONF_API_KEY, CONF_HOST, CONF_HOSTS, CONF_PASSWORD
from homeassistant.core import HomeAssistant
from homeassistant.exceptions import ConfigEntryNotReady
import homeassistant.helpers.config_validation as cv
from homeassistant.helpers.device_registry import CONNECTION_NETWORK_MAC
from homeassistant.util import Throttle

from .const import CONF_UUID, DOMAIN, KEY_MAC, TIMEOUT

_LOGGER = logging.getLogger(__name__)

PARALLEL_UPDATES = 0
MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=60)

PLATFORMS = ["climate", "sensor", "switch"]

CONFIG_SCHEMA = vol.Schema(
    vol.All(
        cv.deprecated(DOMAIN),
        {
            DOMAIN: vol.Schema(
                {
                    vol.Optional(CONF_HOSTS, default=[]): vol.All(
                        cv.ensure_list, [cv.string]
                    )
                }
            )
        },
    ),
    extra=vol.ALLOW_EXTRA,
)


async def async_setup(hass, config):
    """Establish connection with Daikin."""
    if DOMAIN not in config:
        return True

    hosts = config[DOMAIN][CONF_HOSTS]
    if not hosts:
        hass.async_create_task(
            hass.config_entries.flow.async_init(
                DOMAIN, context={"source": SOURCE_IMPORT}
            )
        )
    for host in hosts:
        hass.async_create_task(
            hass.config_entries.flow.async_init(
                DOMAIN, context={"source": SOURCE_IMPORT}, data={CONF_HOST: host}
            )
        )
    return True


async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry):
    """Establish connection with Daikin."""
    conf = entry.data
    # For backwards compat, set unique ID
    if entry.unique_id is None:
        hass.config_entries.async_update_entry(entry, unique_id=conf[KEY_MAC])
    elif ".local" in entry.unique_id:
        hass.config_entries.async_update_entry(entry, unique_id=conf[KEY_MAC])
    daikin_api = await daikin_api_setup(
        hass,
        conf[CONF_HOST],
        conf.get(CONF_API_KEY),
        conf.get(CONF_UUID),
        conf.get(CONF_PASSWORD),
    )
    if not daikin_api:
        return False
    hass.data.setdefault(DOMAIN, {}).update({entry.entry_id: daikin_api})
    hass.config_entries.async_setup_platforms(entry, PLATFORMS)
    return True


async def async_unload_entry(hass, entry):
    """Unload a config entry."""
    unload_ok = await hass.config_entries.async_unload_platforms(entry, PLATFORMS)
    if unload_ok:
        hass.data[DOMAIN].pop(entry.entry_id)
        if not hass.data[DOMAIN]:
            hass.data.pop(DOMAIN)
    return unload_ok


async def daikin_api_setup(hass, host, key, uuid, password):
    """Create a Daikin instance only once."""

    session = hass.helpers.aiohttp_client.async_get_clientsession()
    try:
        with timeout(TIMEOUT):
            device = await Appliance.factory(
                host, session, key=key, uuid=uuid, password=password
            )
    except asyncio.TimeoutError as err:
        _LOGGER.debug("Connection to %s timed out", host)
        raise ConfigEntryNotReady from err
    except ClientConnectionError as err:
        _LOGGER.debug("ClientConnectionError to %s", host)
        raise ConfigEntryNotReady from err
    except Exception:  # pylint: disable=broad-except
        _LOGGER.error("Unexpected error creating device %s", host)
        return None

    api = DaikinApi(device)

    return api


class DaikinApi:
    """Keep the Daikin instance in one place and centralize the update."""

    def __init__(self, device: Appliance):
        """Initialize the Daikin Handle."""
        self.device = device
        self.name = device.values.get("name", "Daikin AC")
        self.ip_address = device.device_ip
        self._available = True

    @Throttle(MIN_TIME_BETWEEN_UPDATES)
    async def async_update(self, **kwargs):
        """Pull the latest data from Daikin."""
        try:
            await self.device.update_status()
            self._available = True
        except ClientConnectionError:
            _LOGGER.warning("Connection failed for %s", self.ip_address)
            self._available = False

    @property
    def available(self) -> bool:
        """Return True if entity is available."""
        return self._available

    @property
    def device_info(self):
        """Return a device description for device registry."""
        info = self.device.values
        return {
            "connections": {(CONNECTION_NETWORK_MAC, self.device.mac)},
            "manufacturer": "Daikin",
            "model": info.get("model"),
            "name": info.get("name"),
            "sw_version": info.get("ver", "").replace("_", "."),
        }